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  <title>取得当前安装的 GD 库的信息</title>
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 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.gd-info" class="refentry">
   <div class="refnamediv">
    <h1 class="refname">gd_info</h1>
    <p class="verinfo">(PHP 4 &gt;= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">gd_info</span> &mdash; <span class="dc-title">取得当前安装的 GD 库的信息</span></p>

   </div>
   <div class="refsect1 unknown-descriptioo" id="refsect1-function.gd-info-unknown-descriptioo">
    <h3 class="title">说明</h3>
    <div class="methodsynopsis dc-description">
     <span class="methodname"><strong>gd_info</strong></span>
      ( <span class="methodparam">void</span>
     ) : <span class="type">array</span></div>

    <p class="simpara">
     返回一个关联数组描述了安装的 GD 库的版本和性能。
    </p>
    <p class="para">
     <table class="doctable table">
      <caption><strong><span class="function"><strong>gd_info()</strong></span> 返回的数组的单元</strong></caption>
      
       <thead>
        <tr>
         <th>属性</th>
         <th>含义</th>
        </tr>

       </thead>

       <tbody class="tbody">
        <tr>
         <td>GD Version</td>
         <td><span class="type"><a href="language.types.string.html" class="type string">string</a></span> 值描述了安装的 <em>libgd</em> 的版本。</td>
        </tr>

        <tr>
         <td>Freetype Support</td>
         <td><span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 值。如果安装了 Freetype 支持则为 <strong><code>TRUE</code></strong>。</td>
        </tr>

        <tr>
         <td>Freetype Linkage</td>
         <td>
          <span class="type"><a href="language.types.string.html" class="type string">string</a></span> 值描述了 Freetype 连接的方法。取值可能为：&#039;with freetype&#039;,
          &#039;with TTF library&#039; 和 &#039;with unknown library&#039;。本单元仅在
          <em>Freetype Support</em> 的值为 <strong><code>TRUE</code></strong> 时有定义。
         </td>
        </tr>

        <tr>
         <td>T1Lib Support</td>
         <td><span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 值。如果包含有 <em>T1Lib</em> 支持则为 <strong><code>TRUE</code></strong>。</td>
        </tr>

        <tr>
         <td>GIF Read Support</td>
         <td>
          <span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 值。如果包含有<em class="emphasis">读取</em>
          <em>GIF</em> 图像的支持则为 <strong><code>TRUE</code></strong>。
         </td>
        </tr>

        <tr>
         <td>GIF Create Support</td>
         <td>
          <span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 值。如果包含有<em class="emphasis">创建</em>
          <em>GIF</em> 图像的支持则为 <strong><code>TRUE</code></strong>。
         </td>
        </tr>

        <tr>
         <td>JPG Support</td>
         <td><span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 值。如果包含有 <em>JPG</em> 支持则为 <strong><code>TRUE</code></strong>。</td>
        </tr>

        <tr>
         <td>PNG Support</td>
         <td><span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 值。如果包含有 <em>PNG</em> 支持则为 <strong><code>TRUE</code></strong>。</td>
        </tr>

        <tr>
         <td>WBMP Support</td>
         <td><span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 值。如果包含有 <em>WBMP</em> 支持则为 <strong><code>TRUE</code></strong>。</td>
        </tr>

        <tr>
         <td>XBM Support</td>
         <td><span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 值。如果包含有 <em>XBM</em> 支持则为 <strong><code>TRUE</code></strong>。</td>
        </tr>

       </tbody>
      
     </table>

    </p>
    <p class="para">
     <div class="example" id="example-3640">
      <p><strong>Example #1 使用 <span class="function"><strong>gd_info()</strong></span></strong></p>
      <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">gd_info</span><span style="color: #007700">());<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
      </div>

      <div class="example-contents"><p>
       典型输出为：
      </p></div>
      <div class="example-contents screen">
<div class="cdata"><pre>
array(9) {
  [&quot;GD Version&quot;]=&gt;
  string(24) &quot;bundled (2.0 compatible)&quot;
  [&quot;FreeType Support&quot;]=&gt;
  bool(false)
  [&quot;T1Lib Support&quot;]=&gt;
  bool(false)
  [&quot;GIF Read Support&quot;]=&gt;
  bool(true)
  [&quot;GIF Create Support&quot;]=&gt;
  bool(false)
  [&quot;JPG Support&quot;]=&gt;
  bool(false)
  [&quot;PNG Support&quot;]=&gt;
  bool(true)
  [&quot;WBMP Support&quot;]=&gt;
  bool(true)
  [&quot;XBM Support&quot;]=&gt;
  bool(false)
}
</pre></div>
      </div>
     </div>
    </p>
    <p class="simpara">
     参见 <span class="function"><a href="imagepng.html" class="function">imagepng()</a></span>，<span class="function"><a href="imagejpeg.html" class="function">imagejpeg()</a></span>，<span class="function"><a href="imagegif.html" class="function">imagegif()</a></span>，<span class="function"><a href="imagewbmp.html" class="function">imagewbmp()</a></span>
     和 <span class="function"><a href="imagetypes.html" class="function">imagetypes()</a></span>。
    </p>
   </div>

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